This is a blog series on Hardware Security Keys such as Yubikey. In this series, you will learn how to use a Yubikey to enhance your digital security and privacy practices, such as using it for 2-factor authentication, using Yubikey for SSH, saving PGP Keys, signing code-commits and much more. This is the first part of the blog series, where you will learn how to set up a Yubikey for U2F-based 2-factor authentication.